PowerColor AX7870 2GBD5-2DH Video Vard Graphics Cards Chipset: ATI Radeon HD7870 Engine Clock:?1000 MHz Video Memory: 2GB DDR5 Memory Clock: 4x 1200MHz (4.8 Gbps) Memory Interface: 256-bit Bus: PCI-Express 3.0 x16 Max. Resolution: 4096 x 2160